WO2012115078A1

WO2012115078A1 - Coating method and device

Info

Publication number: WO2012115078A1
Application number: PCT/JP2012/054054
Authority: WO
Inventors: 松永　正文
Original assignee: エムテックスマート株式会社
Priority date: 2011-02-23
Filing date: 2012-02-21
Publication date: 2012-08-30
Also published as: JP2012170928A

Abstract

To provide an inexpensive coating method and device that can be used to coat an article to be coated inside a coating booth with a flammable coating material safely, sanitarily and automatically. [Solution] A box-shaped coating booth is formed from a fixed bottom-open box and a top-open box which is moved by a second drive shaft or a second drive source; air is sucked in/fed in from the top of the coating booth, and extracted from the bottom of the coating booth; a platform for the article to be coated is provided inside the top-open box; an applicator is exposed from the top of the coating booth; and the article to be coated is coated with the coating material.

Description

Application method and apparatus

The present invention relates to a method and apparatus for applying a coating material such as powder or liquid to an object, and more particularly to an automatic application method and apparatus for a flammable liquid coating agent.

Conventionally, a flammable liquid or powder coating material, in particular, a material containing an organic solvent, is ejected onto an object to form a pattern of lines or dots or an assembly thereof, or is a surface coating method. Many automatic coating apparatuses, in which an applicator such as a spray apparatus, which is a kind of a fine particle generator, is set on an axis orthogonal robot or the like, are manufactured and used in the industry.

In Patent Document 1, the work area and the control area are partitioned by a non-magnetic partition, and the work means is driven indirectly from the control means through the sliding means using a magnet, and the work means is disposed in the work space (coating chamber). An apparatus for applying to an object has been proposed.

In Patent Document 2, the first motor and the second motor outside the workpiece storage chamber are connected to the first screw shaft of the workpiece storage chamber with respect to the workpiece in the workpiece storage chamber (coating chamber) and deployed in the XY direction. An apparatus for applying with an application gun has been proposed.

Many desktop robots with many dispensers, spray nozzles, ultrasonic atomizers, inkjet dispensers and other applicators set as simple plate devices such as those disclosed in Non-Patent Document 1 have been manufactured and many are mainly in the electronics industry. Has been adopted by the industry.

However, although Patent Document 1 considers not to install electric parts that may cause ignition or explosion in the work space (coating chamber), the load of the work means and the sliding are due to the sliding means using magnets. Due to changes in resistance over time, it was impossible to drive while accurately positioning in the micron order required in the electronics industry.

Similarly, Patent Document 2 considers not to install an electrical component in the coating chamber, and uses a screw shaft, so that it can be controlled with high accuracy. However, the coating gun in the workpiece storage chamber (coating chamber) can be moved in the XY direction. There was a complex structure that moved to expand, and it was expensive because it was not only creating the cause of paint particles adhering and falling.

On the other hand, when painting using a simple device such as Non-Patent Document 1, particles and solvent vapor generated during painting were scattered, leading to deterioration of the environment. In order to avoid this, even if a painting room is provided, there are motors, electrical parts, and electric wires that are used as power sources in the painting room, and the user always takes risks.

JP2005-152811 JP 2010-119945

For example, to obtain a coating film such as a polymer on the object to be coated as described above, a solution in which the polymer is dissolved in a flammable aromatic organic solvent or hydrocarbon organic solvent is created and sprayed. Apply to the substrate with a nozzle. Although it can be done manually, usually, to obtain reproducibility, the object to be coated is mounted on the table of a desktop robot equipped with a small 2-axis or 3-axis drive axis, and spray coating is performed. Thereafter, in the case of a monomer such as a thermosetting resin or a UV curable resin remaining on the object to be coated, it is necessary to volatilize the organic solvent and then cure it with heat or ultraviolet light. The same is true for adhesives containing organic solvents. However, for example, in university laboratories, the amount of solution soot is small, so small devices are operated in a draft chamber equipped with air supply and exhaust facilities, so it is negligible that volatile organic solvents affect workers. .

However, when applying frequently in a factory or when applying a large amount of solution, etc., the applicator and the applicator moving device are placed in a booth surrounded by a box with a relatively large air supply / exhaust device. And / or the application | coating operation | work which consists of a table moving apparatus is installed and the coating operation | work is performed. In this case, a power motor used as a driving source which is power, such as a servo motor or a stepping motor, is exposed to an organic solvent or its vapor, and therefore needs to be flameproof. However, in general, the explosion-proof motor is not only large in size but also has a weight that is twice or more heavy, so that a large structure with increased strength is required for installation and is expensive. Further, in the case of using two orthogonal axes or a robot, there has been a limit on the loadable weight of the axis on which one drive axis supports the drive source. In addition, since the normal explosion-proof motor is a custom-made product, it took 4 to 6 months to deliver and it was difficult to meet the short delivery time required by the industry.

In order to cope with this problem, a method is adopted in which a power source such as a motor is placed in the box and pressurized air is injected to increase the atmospheric pressure in the box to prevent the solvent vapor from entering. However, since this method is not generally approved by public inspection by a public institution, it is risky as a self-responsibility.

Even if these simple internal pressure type devices are recognized for convenience at the customer's responsibility, the wiring to the power source and the like is exposed to solvent vapor and must be stored in the piping. When it is necessary to move servo motors and stepping motors that are power sources like orthogonal 2-axis or 3-axis robots, they could not be applied.

There are cases where wiring using explosion-proof wiring connectors is permitted, but even if the wiring is stored in a cable rack that is usually used in robots in the industry, wiring coating deterioration due to sliding or exposure to solvent vapor components There was always a risk of sparks that could not be avoided.

Also, in order to avoid sparks due to disconnection of wiring and abnormal heat generation due to overloading of the power source, the solvent concentration in the booth is much higher than twice the lower limit of the explosion, and the intake from the room and the outside Some methods of exhaust are used. However, the higher the air volume, the more the solvent vapor is diluted and the level at which it does not ignite can be maintained.However, since the wind speed in the booth becomes faster, the particles are scattered in the wind especially when spraying, etc. Efficiency is very low. For example, phosphors used to coat LEDs that emit white light by coating blue light emitting diodes are very expensive, and methods with poor coating efficiency are not accepted by those industries. Currently.

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide an inexpensive coating method and apparatus for coating material that is safe and hygienic even when an organic solvent is used.

In order to solve the above-mentioned problems, the present invention forms a coating booth by a top plate or a lower surface open box fixed by a fixing means and an upper surface open box or a bottom plate moved by at least one drive shaft, and the inside of the upper surface open box or the bottom plate is formed. An application method comprising: providing an object mounting means; mounting an object to be coated; exposing at least a discharge portion from an applicator from an upper part of the application booth; and applying an application material to the object by an applicator. provide.

In order to solve the above-mentioned problems, the present invention provides an opening in the fixed top plate or the lower open box, and is attached to at least a discharge part or a bracket of the applicator that moves by the first driving source or the first driving shaft from the opening. The upper open box or bottom plate is moved by the second drive source or the second drive shaft at right angles to the moving direction of the bracket on which the applicator is mounted, and the upper open box is exposed. It is characterized in that an article posting means is provided on the inner or bottom plate, the article is mounted, air is supplied or supplied from the upper part of the application booth, exhausted from the lower part, and the application material is applied to the object with an applicator. An application method is provided.

In order to solve the above-mentioned problems, the present invention connects the first drive shaft to a third drive source or drive shaft that can automatically move the applicator up and down, the object mounting means is a table, and the bottom plate Alternatively, a coating method characterized in that adsorption and heating means are provided on a table installed in the upper open box.

In order to solve the above-mentioned problems, in the present invention, a coating method is preferable in which the applicator is a fine particle generator and the coating material is a solution or slurry containing a solvent.

The opening of the top plate or the lower open box is sealed by a belt that moves simultaneously with the applicator or the bracket, and at least air is sucked from the gap between the top plate or the lower surface open box and the upper surface open box, and the object to be coated on the upper surface open box is mounted. A coating method characterized by exhausting from an exhaust section provided in the vicinity of the means is preferable.

The method is characterized in that the top open box or bottom plate is connected to a second drive shaft, and the movement is supported by rolling or sliding means provided at the bottom of the top open box or bottom plate.

In order to solve the above-mentioned problems, the present invention includes an LED chip or an assembly thereof mounted on the table, and a slurry composed of an organic solvent, a binder and a phosphor (Phosphor). Move in a slurry moving circuit and uniformly disperse, move the particle generator and LED chip relatively in pitch, and apply at least one layer of slurry on the surface of the LED chip with the particle generator, Provided is a coating method characterized in that after drying, multiple layer coating and drying are repeated while shifting the pitch position.

In order to solve the above-mentioned problems, in the present invention, an opening is provided on the upper surface of the fixed lower surface open box, and the opening is connected to the first drive source or the first drive shaft and is orthogonal to the moving method of the applicator. Then, an object mounting means is provided on the bottom plate that is moved by the second drive source or the second drive shaft, the object is mounted in the object loading / unloading zone, and moved to the application booth. Apply at least one layer of liquid on the coating object with the applicator while relatively moving the pitch between the coating object and the coating object, move the coating object to the drying zone outside the booth, dry it, and then move to the coating booth. Then, a method is provided in which coating is performed while shifting the position of the pitch, and the coating and impression are repeated in a plurality of layers.

In order to solve the above-mentioned problems, the present invention forms a coating booth with a top plate or a lower surface open box fixed to a structure, a moving upper surface open box and a bottom plate, and provides an opening above the coating booth. The applicator mounted on at least the applicator discharge section or bracket that is moved by one drive source or the first drive shaft is exposed in the application booth, and the upper open box or the bottom plate is orthogonal to the moving direction of the applicator. And moving with a second drive source or a second drive shaft, a coating object mounting table is provided on the top open box or bottom plate, the coating object is fixed, and the coating material is applied with an applicator. An apparatus is provided.

According to the method or apparatus of the present invention, for example, a non-patent document (Musashi Engineering Co., Ltd. General Catalog CAT.No.GC1509-10.J20, 28) can be used without newly designing and producing a coating booth, a driving source and a driving shaft. , Page 29), an opening is provided in a part of the upslope or lower open box fixed to the gate of a commercially available gate-type 3-axis robot, etc., and moves up and down while interlocking with the X axis (the first drive axis of the present invention). By mounting a spray gun on a bracket fixed to the Z axis (third drive shaft) that moves to the Y axis (second drive shaft) and mounting an open top box with a table on the Y axis (second drive shaft), an inexpensive device can be obtained. Can be provided.

It is a schematic sectional view seen from the side of the coating device concerning a 1st embodiment of the present invention. It is a schematic sectional view seen from the side of the coating device concerning a 1st embodiment of the present invention. 1 is a schematic plan view of a coating apparatus according to a first embodiment of the present invention. It is a schematic front view of the coating device concerning 1st Embodiment of this invention. It is a schematic front view of the coating device concerning 1st Embodiment of this invention. It is the schematic sectional drawing seen from the side of the coating device concerning a 2nd embodiment of the present invention. It is a schematic plan view of the coating device concerning 2nd Embodiment of this invention. It is a schematic plan view of the coating device concerning 3rd Embodiment of this invention. It is schematic sectional drawing seen from the side surface of the coating device concerning 4th Embodiment of this invention. It is schematic sectional drawing seen from the front of the coating device concerning 4th Embodiment of this invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The following embodiments are merely examples for facilitating understanding of the invention, and exclude additions, substitutions, modifications, etc. that can be implemented by those skilled in the art without departing from the technical idea of the present invention. is not.

The drawings schematically show a preferred embodiment of the present invention.

(First embodiment)
1 to 5 show a coating apparatus according to a first embodiment of the present invention. FIG. 1 is a cross-sectional view of the coating apparatus as seen from the side, FIG. 2 is a cross-sectional view as seen from the side, and FIG. 4 is a front view, and FIG. 5 is a schematic view seen from the front.

A booth 30 is formed by the lower open box 3 fixed in FIG. 1 and the upper open box 4 that moves, and an opening 21 is provided in a part of the lower open box 3. The opening can be sealed with a sealing belt 28 that moves in conjunction with the bracket 6 on which the applicator 1 is mounted. The lower open box is preferably a shallow lower open box, and the width direction should be slightly wider, but the moving direction needs to be longer in consideration of the moving distance of the upper open box. The structure of the contact belt has been described in detail in Japanese Patent Application No. 2010-003319 filed by the present inventor, and will not be described. The applicator 1 is connected by a first drive shaft 16 in which the upper open box moves, a third drive shaft 18 for moving the applicator up and down, and a blanket. The upper surface open box is provided with a table 11 and a suction mechanism 12 that can be heated by a heating element 13 or the like as an object mounting means, and the object 14 is adsorbed using a vacuum pump or an ejector effect so that it does not move. The second drive shaft is moved with the top open box while being fixed and heated.
You may make it the structure which can adsorb | suck and heat with one table. Further, heating and adsorption are not limited, and a table without a heating means can be used, or cooling can be performed using a cooling device. In this apparatus, since the installation place of the table or the heating element for the table can be provided outside the booth, the apparatus is safe even if the coating material is flammable. In addition, heating may be performed by circulating not only the heating element but also a heating medium, induction heating, high-frequency heating, etc. can be used, and the apparatus and method are not limited. Further, instead of the suction table, a relatively heavy masking substrate or the like can be placed on the object to be coated to fix the object to be coated. Since the applicator and the object to be coated on the table are orthogonally moved relative to each other, the coating material can be effectively applied by the applicator to the entire object to be coated or only at a desired location by a command from a separately installed control mechanism.

In FIG. 2, a booth is formed through a gap 7 between the fixed top plate 2 and the moving top open box 3. Air can be sucked into the booth from the gap between the top plate and the open top box. If you want to make sliding movement without providing a gap, a filter such as HEPA can be installed on a part of the top plate to suck outside air into the booth. The top plate means a plate in a broad sense, and may be not only a simple plate but also a processed or reinforced structure, or a complex in which other devices are incorporated. The open top box on which the table 11 is installed is supported by a roll 19 and a guide 20 which are one of rolling or sliding means and can move smoothly. The top plate is provided with an opening, and only a part (tip) of the applicator is exposed in the booth. In particular, when the applicator is a fine particle generator such as a spray, it can be said to be an ideal applicator because there are almost no spots to which scattered particles adhere. The applicator can be fixed without moving, and only the top open box can be moved to apply to the object, or the first drive shaft 16 that moves the applicator perpendicular to the object movement direction. Can be applied to a wide area by extending the opening in the moving direction of the applicator. The object to be coated is intermittently fed at a desired pitch by the second drive source together with the open top box, and the applicator moves while being applied while it is stopped. Application and intermittent movement of the object to be coated can be repeated to coat one layer. When coating the second and subsequent layers, uniform coating can be performed by automatically shifting the pitch position (application start position) with the program of another installation control device (offset). Further, the first drive shaft interlocked with the applicator can be intermittently fed, and the upper surface open box interlocked with the second drive shaft can be applied while being interlocked when stopped. The same method should be adopted for the second and subsequent layers. These can also be performed alternately. Instead of the respective drive shafts, ropes, belts, guide rails and the like that can be operated by a drive source may be used.

In FIG. 4, the lower surface open box 3 is attached and fixed to the structure 24. A door 25 is provided in front of the upper open box so that the inside of the booth can be accessed. An exhaust part (filter) 26 is provided at both lower portions of the booth, and a roll 19 and a guide 20 which are one of rolling or sliding means are provided below the exhaust part (filter) 26. The mounting positions of the rolls and guides are not limited, and may be under the table or at other locations.

In FIG. 5, an outer booth 31 is provided around the coating device 22, and an intake filter 27 is provided on the outer booth 31. Since the upper open box is moved by the second drive source and the second drive shaft, it is preferable to attach an outer booth from the viewpoint of safety. It is preferable to install a safety switch on the open / close door of the outer booth (not shown) so that the coating apparatus can be stopped instantaneously when the door is opened or closed. Intake filters such as HEPA in the outer booth are convenient for maintaining the environment inside the coating booth when a gap is formed between the top plate and the bottom open box.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS.

In the second embodiment, FIG. 6 is a sectional view seen from the side, and FIG. 7 is a plan view.

In FIG. 6, a coating booth 103 is formed with the bottom plate 105 that is moved by the second drive source 115 or the second drive shaft 116 while being in contact with the fixed lower surface open box 103 or with a slight gap therebetween. An exhaust part is formed in the front and rear lower part in the moving direction. The exhaust part is connected to an exhaust fan 135 via a duct. The exhaust part preferably has a built-in filter, and may be exhausted from the entire periphery of the lower open box. Further, the exhaust part may be formed at least around the periphery of the table 111 or the suction table 112 of the object mounting means on the bottom plate, and exhausted by connecting a flexible duct from the lower part of the bottom plate. The applicator is attached to the bracket 106 and exposed from the opening 121 into the coating booth. When the applicator is not moved up and down, the opening may be provided not only on the top surface of the lower open box, but also on the front and back side surfaces in the moving direction of the bottom plate, and an L-shaped bracket may be used. A bracket may be used when the applicator is not moved orthogonally to the bottom plate. When the applicator is not moved perpendicular to the bottom plate, the gap between the bracket and the opening may be sealed with a sealing tool such as packing. When the applicator is moved using the first drive shaft 110 or the like, the opening may be sealed with a sealing belt synchronized with the bracket similar to that shown in FIG. An air intake portion 127, preferably an air intake portion incorporating a filter such as HEPA, can be provided at the top of the booth. The air intake is particularly effective when packing or a sealing belt is used. In addition, the level of the fixture 114 and the fixture of the article mounting means should be lower than the upper surface of the bottom plate, and flattening the upper surface of the bottom plate can narrow the gap 107 and move the lower surface open box and the bottom plate in contact with each other. Is convenient. Moreover, the application | coating operation | work to a to-be-coated object can be performed similarly to 1st Embodiment.

In FIG. 7, the bottom plate 105 is longer in the front-rear direction than the lower open box and wider in the width direction than the exhaust part.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG.

In FIG. 8, a coating booth 130 is formed in the vicinity of the center from a bottom open box 203 and a bottom plate 205 that is moved by the second drive source 215 or the second drive shaft 216. The coating operation can be performed by the same method as in the first or second embodiment.
An opening / closing door 240 for loading and unloading the article 114 is provided upstream of the coating booth. Further, downstream of the coating booth is provided with a drying means 250 which can at least start the curing of the coating film of the object to be coated and prevent the coating film from flowing, or can be completely cured. In other words, it consists of a workpiece loading / unloading zone, a coating zone, and a coating film drying zone, and coating and drying operations can be automatically performed by commands from a separately installed control device. Further, for example, by using an automatic machine or a robot (not shown), it is possible to automatically carry in / out the object to be coated.

For example, when a phosphor is applied to the surface of a ceramic substrate for high-power lighting or a wafer level LED chip, a dispenser that is frequently used in other LED applications is used, and a slurry in which a binder such as silicone is mixed with the phosphor. For example, there is a relationship between the surface tension and the interfacial tension, so the film thickness at the center of the dispenser on the surface of the LED chip of about 1 mm square rises, and as it gets closer to the edge, it becomes thin due to the influence of sink marks. It was impossible. In addition, the height is about 0.1mm, so the edge is too thin, and the adhesion to the side wall is extremely unstable, and the variation in color temperature is too large. It was unsuitable.

Therefore, for example, US2009 / 10179213A1 introduces a technique in which a binder is applied to a chip, a slurry comprising a binder, a phosphor and a solvent is applied onto the film by an air spray method, and if necessary, a multilayer coating is applied. Yes. As mentioned above, the LED chip has a three-dimensional structure, and there are also wires, etc., so to make the film thickness on the top surface of the chip uniform, the ratio of the phosphor can be increased by the method using a fine particle generator such as air spray. It is important to make a slurry that is made as much as possible than the binder, diluted with a solvent to make it flowable, and as thin as possible to coat as many layers as possible. Further, even if the spray method is used, it is impossible to coat relatively thinly unless it is diluted with a solvent. A preferable range of one thin film is about 3 to 15 micrometers in terms of weight per unit area when dried.

However, even when a thin multilayer coating is applied with a slurry containing a solvent, the binder will be re-dissolved or swollen with the solvent if applied on a coating film where the solvent remains or curing has not started. It tends to be similar to the quality of the thickly applied coating. Therefore, it is also important to heat the workpiece and volatilize the solvent instantly. Even if heated, if the coating film is thick, the solvent does not volatilize instantaneously, so there is a relationship between surface tension and interfacial tension. If the temperature of the object to be coated is set to 90 ° C to 150 ° C, the binder contained in the spray particles is set before flowing on the chip surface. It becomes unsmooth and quality defects occur. The temperature of the object to be coated is preferably in the range of 35 ° C. to 90 ° C., more ideally 50 ° C. to 70 ° C., although it depends on the type of solvent.

On the other hand, when applying by spraying or the like, the surface of the LED chip is rapidly cooled by the heat of vaporization due to the volatilization of the solvent, so 1.5 W to 4.5 W per square centimeter to prevent temperature drop and improve temperature follow-up. A calorie is necessary. When the table size is 225 to 2500 square centimeters and a plurality of ceramic substrates and wafers are mounted, productivity may be improved. In addition, it is necessary to mask the area where the application is prohibited, for example, an area where soldering must be performed later.

The ceramic substrate or wafer mounted on the table heated in the coating object mounting zone proceeds to the coating zone by the second driving source or the second driving shaft and moves the coating object by the first driving source or the first driving shaft. Intermittent movement is started pitchwise before the applicator that traverses perpendicularly to the direction. The table stops moving while the applicator strokes the required distance on one side. When the application is finished or the stroke is finished, the table moves intermittently by one pitch. By repeating this operation, one layer can be applied (coated). When the applicator is an air spray or an air assist spray, a spray nozzle having a spray angle such that the pattern width on the surface of the object to be coated is about 1 to 20 mm is preferable, and the entire chip is desired depending on the shape and type of the chip. The pattern width should be selected in consideration of the film thickness of each part. The spray may be a continuous spray, but in order to obtain the desired film thickness on the edges and side walls of the LED chip, the pulse by air spray described in PCT application number: PTC / JP2011 / 050168, which is the right of the applicant. It is more effective to use the spray method. Furthermore, it is difficult to cover the side wall and the vicinity of the edge unless it is made to collide with the LED surface while giving an impact to a slurry made of a binder such as silicone. Even if a thin film is desired, if the nozzle diameter is reduced due to the nature of the slurry or the flow rate is kept low by reducing the opening of the needle valve, etc., the coating quality will become unstable and the coating quality will become unstable. . From this point of view, the impact pulse spray method is the most effective. The impact pulse spray can be obtained by setting the distance between the nozzle tip and the object to be coated to 70 mm or less and setting the spray air to 0.15 to 0.35 MPa. Since the impact is too strong when spraying from a close distance of 5 to 30 mm, it is preferable to adjust the spray air in the range of 0.05 to 0.15. The intermittent feed pitch is preferably 1 mm to 15 mm. When the average dry film thickness of one layer is about 7 micrometers or less in terms of dry weight, it is more productive to coat multiple times and then move to the drying zone for drying. Excellent in terms of

On the other hand, the temperature in the drying means is preferably 90 to 200 ° C., and the drying means is not limited to hot air, far infrared rays, high frequency, induction heating, UV, microwave curing, etc. It is important to select from the viewpoint of productivity.
Ideally, the coating start position of the second layer is automatically shifted (offset) by a desired length from the start of the first layer regardless of the number of layers to be dried. When coating with 10 layers When the pitch is 12 mm, the result of the 10th layer is made 1.2 mm by changing the shift amount to 1.2 mm, and the result of the 10th layer is coated with a pitch feed of 1.2 mm Will be the same. However, since the coating is performed with coarse and repeated coating rather than coating with a dense pitch, there is an advantage that the application weight per unit area per layer can be reduced and the above-mentioned problems can be solved. The offset value is preferably obtained by dividing the feed pitch by the number of layers, and is usually set to 0.1 mm to 5 mm. If one layer is applied 1 times, the number of coatings is preferably as many as possible. However, there is a limit in terms of productivity and the average particle size (particle size distribution centering on 3 to 30 micrometers) of the phosphor. It is preferable to select from about 2 to 30 times (layers) in relation to quality performance and productivity. In this way, the object to be coated having completed the desired number of times of application is moved to the take-out zone and put into a high-temperature dryer or the like for complete curing manually or automatically.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIGS.

9 uses a belt conveyor 360 instead of the bottom plate of FIG. The table moves while being connected to the second drive source 315 or the second drive shaft 316, and the belt also moves simultaneously. When the roll 370 is a free roll, the belt moves smoothly. Further, the bottom plate may be connected to the belt with a minimum length. If this method is adopted, there is an advantage that the length of the apparatus can be shortened as compared with the case of using a flat bottom plate, and it is particularly effective when a drying zone, an object loading / unloading zone is provided. The table may be moved by a belt conveyor system by attaching a drive source to a roll and using the belt conveyor together with an anti-slip mechanism such as a timing belt or a chain.

In FIG. 10, the contact belt 328 for opening that interlocks with the bracket on which the applicator 301 is mounted is mounted so as to be able to circulate and the contact belt can move smoothly.

According to the present invention, it is possible to form a coating film with a flammable liquid or powder, or a film forming raw material gas by an inexpensive apparatus.

DESCRIPTION OF SYMBOLS 1 Applicator 2 Top plate 3 Lower surface open box 4 Upper surface open box 5 Bottom plate 6 Bracket 7 Gap 8 Applicator discharge part 9 First drive source 10 First drive shaft 11 Table
DESCRIPTION OF SYMBOLS 12 Adsorption mechanism 13 Heating element 14 To-be-coated object 15 2nd drive source 16 2nd drive shaft 17 3rd drive source 18 3rd drive shaft 19 Roll 20 Roll guide 20 Roll guide 21 Opening 22 Coating device 23 Base 24 Structure 25 Door 26 Exhaust section (exhaust filter)
27 Air intake part (intake filter)
28 Sealing belt 30 Application booth

Claims

A box-shaped coating booth is formed by the top plate or bottom open box fixed by the fixing means and the top open box or bottom plate moving by at least one drive source or drive shaft, and the object to be coated is mounted in the top open box or on the bottom plate. A coating method comprising: providing means; mounting an object to be coated; exposing at least a discharge portion of the applicator from an opening provided at an upper portion of the coating booth; and applying the coating material to the object to be coated with the applicator.
An opening is provided in the fixed top plate or lower open box, and an applicator mounted on at least a part of the applicator or a bracket that is moved by the first drive source or the first drive shaft from the opening is installed in the application booth. The upper open box or the bottom plate is exposed and moved by a second drive source or a second drive shaft orthogonal to the moving direction of the applicator, and an object mounting means is provided in the upper open box or the bottom plate. 2. The coating method according to claim 1, wherein the coating material is sucked or supplied from above the coating booth, exhausted from the bottom, and the coating material is coated on the object to be coated by a coating device.
A third drive source or a third drive shaft capable of automatically moving the applicator up and down is connected to the first drive shaft, and the article mounting means is a table, and is attached to the top open box or the bottom plate. The coating method according to claim 1 or 2, wherein means for adsorbing and heating an object to be coated is provided on the installed table.
The coating method according to any one of claims 1 to 3, wherein the applicator is a fine particle generator, and the coating material is a solution containing a solvent or a slurry.
The opening is sealed by a sealing belt that moves simultaneously with the applicator or the bracket, and sucks at least from the gap between the top plate or the lower surface open box and the upper surface open box, and near the article mounting means in the upper surface open box. 5. The coating method according to claim 1, wherein exhaust is performed from an exhaust section provided.
The coating method according to any one of claims 1 to 5, wherein the upper surface open box or the bottom plate is connected to a second drive shaft, and the movement is supported by rolling or sliding means provided in the upper surface open box or the bottom plate.
An LED chip or an assembly thereof is mounted on the table and heated, and a slurry composed of an organic solvent, a binder, and a phosphor is moved in a slurry moving circuit including the fine particle generator to be uniform. Disperse, move the fine particle generator and LED chip relative to each other, apply at least one layer of slurry on the surface of the LED chip with the fine particle generator, dry, and then apply and dry multiple layers while shifting the pitch position 7. The coating method according to claim 1, wherein the coating is repeated.
An opening is provided in the upper portion of the fixed lower surface open box, and the second drive source or the second drive shaft is orthogonal to the moving direction of the applicator that moves by connecting the opening to the first drive source or the first drive shaft. In the bottom plate that moves in place, the substrate mounting means is installed, the substrate is mounted in the substrate loading / unloading zone, moved to the coating booth, and the applicator and the substrate are moved relatively in pitch Apply at least one layer of solution or slurry to the object with the applicator, move the object to the drying zone outside the application booth, dry it, apply it while shifting the pitch position, and apply and dry several times. 8. The coating method according to claim 1, wherein the coating method moves to a coating object loading / unloading zone and the coating material is taken out after repeating.
A box-shaped coating booth is formed by a top plate or bottom open box fixed to the structure and a top open release box or bottom plate that moves, and an opening is provided in the top plate or bottom open box, and a first drive source or The applicator mounted on at least the discharge part or bracket of the applicator that is moved by the first drive shaft is exposed in the application booth, and the upper open box or the bottom plate is perpendicular to the moving direction of the applicator. It is moved by a drive source or a second drive shaft, a coated object mounting table is provided on the top open box or the bottom plate, the coated object is fixed, and the coating material is applied to the coated object with an applicator. A coating device.